Ore-concentrator.



PATENTED JULY 16, 1907.

J. C. TAI'MAN. ORE GONCENTRATOR.

APPLIOATION rum) MAB. a. 1900.

4 SHEETS-SHEET 1.

No. 860,500. PATENTED JULY 16, 1907.

J. G. TATMAN. ORE GONGENTRATOR.

APPLIOATION FILED KARL 2, 1906.

4 SHEETS-SHEET 2.

JNVENTOR.

WITNESSES.-

rur NORRIS PETER: co. wasm'ucran. n. c.

No. 860,500. t PATENTED JULY 10, 1907. 0

- J. 0. TATMAN.

ORE GONGENTRATOR.

APPLICATION FILED HA3. 2. 1 906.

4 SHEE-"B-SHEET 8.

NOR

' WITNESSES:

BY M050 ATTORNEYS PATENTED JULY 16, 1907.

' J. G. TATMAN.

, ORB GONGENTRATOR.

APPLICATION FILED HA3- 2, 1908.

4 sums-sum 4.

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UNITE STATES JOHN OOSGROVE TATMAN, OF DENVER, COLORADO.

ORE-CONCENTRATOR.

Specification of Letters Patent.

Patented July 16, 19 07.

Application filed March 2, 1906. Serial No. 303,825.

To all whom it may concern:

Be it known that I, JOHN Oosonovn TATMAN, a citizen of the United States, and a resident of Denver, in the county of Denver and'State'of Colorado, have invented a new and Improved Ore-Concentrator, of which the following is a full, clear, and exact description.

The invention relates to ore concentrators using a rifiled moving endless apron, and its object is to provide a new and improved ore concentrator arranged to insure a quick and thorough separation of the valuable metallic particles from the tailings in a very simple and exceedingly economic manner.

The invention consists of novel features and parts and combinations of the same which will be more fully described hereinafter and then pointed out in the claims.

A practical embodiment of the invention is represented in the accompanying drawings forming a part of this specification, in which similar characters of referonce indicate corresponding parts in all the views.

Figure 1 is a perspective view of the improvement; Fig.2 is a transverse section of the apron and its roller table; Fig. 3 is a plan view of the improvement, the apron being removed and parts of the roller table being broken out; Fig. 4 is an enlarged transverse section of the improvement; Fig. 5 is an enlarged longitudinal sectional elevation of the same; Fig. 6 is a longitudinal sectional elevation of the mechanism for imparting an intermittent traveling motion to the apron; Fig 7 is a plan view of the same; Fig. 8 is a side elevation of part of the same; Fig. 9 is an end view of the same; Fig. 10 is a side elevation of the mechanism for imparting a transverse reciprocating motion to the apron table and the apron; and Fig. 11 is a plan view of the same.

A suitably constructed framework A is provided with bearingsA, in which are mounted to turn the trunnions B of a rock shaft B, preferably square in cross section and extending transversely, as plainly illustrated in the drawings. This rock shaft B is engaged by bearings 0 attached to an apron frame 0, in which are journaled horizontally-disposed transverse main rollers D and side rollers D inclined upwardly and outwardly from the ends of the main rollers D, as will be readily understood by reference to the drawings. For the purpose mentioned, the main rollers D are journaled in suitable bearings arranged on longitudinal bars C forming part of the apron frame 0, and the side rollers D are 'journaled in suitable bearings arranged in the said bars G and similar bars 0 likewise forming part of the frame 0 (see Fig. 2). Over the rollers D and D extends the upper run of an endless apron E made of suitable flexible material and provided with trans versely-extending riffies E, corrugations, grooves or the like. The said upper run of the apron, on account of resting on the horizontal as well as the inclined rollers D, D, assumes a trough-like shape, to prevent spilling of the material over the sides of the apron.

The apron E passes around drums F and G, of which the drum F is somewhat larger in diameter than the drum G and is journaled in suitable bearings in the head end of the apron frame C, while the drum G is journaled in bearings H held lengthwise adjustable on the apron frame C, to allow of moving the drum G inward or outward, to render the apron E sufficiently taut for proper working of the same. The under side of the apron E is provided with length wise-extending ribs or hands E engaging corresponding annular recesses D in the rollers D, as well as similar annular recesses F in the drum F, to hold the apron against accidental transverse movement on the rollers D and drums F and G.

In order to impart a transverse reciprocating motion to the frame C, the rollers D and D, drums F and G, and apron E, the following device is provided: To one side of the frame C is secured a transversely-extending arm I, engaged at its outer end by the upper end .of a lever I fulcrumed on a bracket 1 and engaged at its lower end by a pitman I connected with suitable machinery for imparting a swinging motion to the lever I, which, by the arm I, imparts a transverse sliding motion to the frame C and the parts carried thereby. The pitman I is guided in a suitable guideway 1 arranged on a base I carrying a standard I in which is journaled a screw-rod l scre\v ing in the bracket 1 and provided with a hand wheel I which, when turned, causes the bracket 1 to move up or down, according to the direction in which the hand wheel I is turned. By this arrangement the fulcrum for the lover I, that is, the bracket 1 is shifted so that more or less throw is given to the frame C and the parts carried thereby without changing the throw of the pitman 1 p In order to impart an intermittent traveling motion to the apron E in the direction of the arrow a independently of any movement of the main frame, the following device is provided: On the drum F are formed ratchet wheels F engaged by pawls J, pivoted to rods J mounted to slide lengthwise in suitable bearings J attached to the forward cross arm G of the apron frame C (see Figs. 6 and 7), and the said rods .l are attached to a slide J 3 mounted to slide in longitudinal bearings B attached to the shaft B at or near the middle thereof, as plainly indicated in Figs. 3 and 7. The slide J is provided with a lengthwiseextending slot J and a transverse pin J, to which are secured, on opposite sides, the ends of a rope J passing over pulleys J and J journalcd on the slide J on opposite sides of the pin J The rope J winds several times around a drum J journaled in suitable bearings I attached to the under side of the shaft B, and the shaft .1 of this drum .1 is provided with a crank arm J 1? under the control of the operator for imparting a rocking motion to the drum J, so as to cause the rope J to impart a forward and backward sliding motion to the slide J which, by the rods J and the pawls J engaging the ratchet wheels F, intermittently turns the drum F in the direction of the arrow 1) independently of any movement of the main frame, thus causing the apron E to travel intermit tently in the direction of the arrow a.

The crank arm .1 normally extends between sets of spaced pins B held on a disk B eccentrically secured to one end of the shaft B, the rocking motion of which is limited by an arm B attached to the shaft B and extending between two brackets K and K held on the framework A (see Fig. 1). The swinging motion of this arm B is limited by a screw-rod K screwing in the bracket K and abutting against the arm 13*. By turning the screw-rod K a swinging motion can be given to the arm B so as to turn the shaft B to tilt or incline the frame G, and consequently the apron E, to a desired degree; that is, to raise the forward end of the apron E for the upper run of the latter to travel forwardly and upwardly. The apron E, when passing around the drum F, passes into water or other liquid contained in a tank L, so that any concentrates contained in the riffies are washed out of the same during the rearward travel of the lower run of the apron, it being understood that the tank L is sufficiently long for the riffles to pass a considerable distance through the water, to insure a complete washing out of any concentrates contained in the riflies. By reference to Fig. 5 it will be seen that the apron has free, unobstructed travel through the liquid contained in the tank L. i n

The operation is as follows: By the operator manipulating the crank arm J an intermittent forward feeding of the apron E in the direction of the arrow 11 is obtained, and at the same time a transverse shak ing motion is given to the apron E by imparting a reciprocating sliding motion to the frame 0 by the arm I and connected parts, as above explained. Across the head of the apron E, at'or near the drum F, is arranged a perforated pipe for discharging jets of water onto the upper face of the upper run of the apron, so as to wash the tailings backward in the inverse direction of the arrow (1, to finally discharge the tailings at the rear end of the apron, at the drum G. As the upper run of the apron E assumes a trough-like shape, it is evident that the wash water does not wash valuable particles over the sides of the apron, and consequently the valuable metallic particles readily lodge in the ritfles and are continually carried forward bodily with the belt, to be finally discharged into the tank L, as previously explained.

From the foregoing it will be seen that the material discharged onto the apron E, at or near the rear end thereof, and carried bodily forward with the apron is acted on by the wash water, which tends to separate the tailings from the heavy particles, which latter lodge in the riftles, while the tailings are washed rear= wardly over the rear end of the apron. Thus it will be seen that the valuable particles lodging in the riffles are carried bodily forward with the apron, and the tailings are completely washed out of the concentrates, but no concentrates are lost, as the riffles extending throughout the length of the apron and in a transverse direction, thereby prevent the valuable particles from being washed off the apron with the tailings. Thus the separation of the valuable particles ,Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. An ore concentrator comprising a rock shaft, a main frame mounted upon said shaft and adapted to slide thereon transversely of said frame, transverse drums journaled in the ends of said frame, an endless apron having transverse rilfies mounted on said frame, a ratchet wheel secured to one of said drums, a reciprocating slide provided with a pawl adapted to engage said ratchet wheel, and means for imparting a sliding motion to said frame on said rock shaft, substantially as shown and described. I

An ore concentrator provided with a roller table having a main frame. transverse rollers journaled in the frame and arranged in a horizontal plane,-side rollers journaled in the frame at the ends of the main rollers and inclined thereto to form a trough-like structure, drums journaled on the ends of said frame, an endless apron mounted to travel over said rollers and assuming a troughlike shape. a transverse shaft on which the middle of said frame is mounted to slide, reciprocating means for imparting transverse sliding motion to said frame on said shaft means for adjusting the frame vertically, and means for intermittently turning one of said drums to permit-an in termittent travelingmotion to said apron independently of the movement of the main frame, substantially as shown and described.

3. An ore concentrator provided with a roller table comprising a frame, transverse main rollers jonrnaled in the frame and arranged in a horizontal plane, side rollers journaled in the frame at the ends of the main rollers and in clined thereto to form a trough-like structure, drums journaled in the ends of said frame, an endless apron mounted to travel over said drums, means for intermittently turningone of the drums to impart a traveling motion to said apron independently of any movement of said frame, a rock shaft mounted transversely to the direction of travel of the said apron and in which the frame is mounted to slide transversely, means for imparting transverse motion to said frame on said shaft, and means connected with said shaft to rock the latter thereby to tilt the frame and apron to the desired inclination, substantially as shown and described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

JOHN COSGROVE TATMAN.

Witnesses H. J. INGERSOLL, FRED S. Swnn'r. 

